I have done radiation testing on the PIC16C77 and the PIC16C73 using
protons and a cobalt source. The PICs are quite radiation tolerant. At
slow dose rates (200 rads a minute), I have had PICS function after
96Krads of total dose from a cobalt source. The EPROM was erased at
25Krads total dose at a dose rate of 2Krads/minute. I was able to
reprogram it and run for another 10Krads before a complete failure. For
SEUs, expect single event upsets at about 3MeV. Latchups occured at
about 17MeV. This was using a laser simulating high energy particles.
The testing was done on the EPROM version. I did test a PIC16F73 and it
failed at 9 Krads at 2krad/minute. I never tested for single event
upsets or latchups.
Using a proton source, the PICs have been tested to an equivelant of 17
year life in LEO.
Want to use a real time clock chip, check out the Xicor X1226 which is
now owned by Intersil. It did not fail during proton testing, no latch
ups or single event upsets.
Ivan
Assi Friedman wrote:
>There are a number of PIC controllers flying on ham and commercial birds.
>Assi kk7kx/4x1kx
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